Gwilym Was Da
  • fl. c. 1300
  • scribes, Welsh people
  • New Town of Dinefwr
al. Gwilym Wasta, Welsh scribe
See also references for related subjects.
Russell, Paul, “Canyt oes aruer: Gwilym Wasta and the laws of court in Welsh law”, North American Journal of Celtic Studies 1:2 (November, 2017): 173–188. 
abstract:
It is conventional to divide the manuscript tradition of the Blegywryd redaction of the Welsh laws into two groups depending on whether they contain the Laws of Court and where the triads are positioned. It has long been recognised that Gwilym Wasta (working ca. 1300) was the scribe of the three manuscripts which do not contain the Laws of Court and that in three of the manuscripts he replaced them with a colophon in which he seems to claim that he has omitted them because they were no longer in use. This paper argues that matters might be rather more complicated and that the omission of the Laws of Court may have been more by accident than design.
Owen, Morfydd E., and Dafydd Jenkins, “Gwilym Was Da”, National Library of Wales Journal 21 (1980): 429.
Aberystwyth, National Library of Wales: <link>
Aberystwyth, National Library of Wales, Peniarth MS 36B [s. xivin or s. xiiiex]
scribes:Gwilym Was Da
Cambridge, Trinity College, MS O.7.1 [s. xivin]
scribes:Gwilym Was Da